<?php

    /**
     * PHPExcel_Worksheet_MemoryDrawing
     * Copyright (c) 2006 - 2015 PHPExcel
     * This library is free software; you can redistribute it and/or
     * modify it under the terms of the GNU Lesser General Public
     * License as published by the Free Software Foundation; either
     * version 2.1 of the License, or (at your option) any later version.
     * This library is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     * Lesser General Public License for more details.
     * You should have received a copy of the GNU Lesser General Public
     * License along with this library; if not, write to the Free Software
     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
     * @category   PHPExcel
     * @package    PHPExcel_Worksheet
     * @copyright  Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
     * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
     * @version    ##VERSION##, ##DATE##
     */
    class PHPExcel_Worksheet_MemoryDrawing extends PHPExcel_Worksheet_BaseDrawing implements PHPExcel_IComparable {
        /* Rendering functions */
        const RENDERING_DEFAULT = 'imagepng';
        const RENDERING_PNG     = 'imagepng';
        const RENDERING_GIF     = 'imagegif';
        const RENDERING_JPEG    = 'imagejpeg';
        /* MIME types */
        const MIMETYPE_DEFAULT = 'image/png';
        const MIMETYPE_PNG     = 'image/png';
        const MIMETYPE_GIF     = 'image/gif';
        const MIMETYPE_JPEG    = 'image/jpeg';
        /**
         * Image resource
         * @var resource
         */
        private $imageResource;
        /**
         * Rendering function
         * @var string
         */
        private $renderingFunction;
        /**
         * Mime type
         * @var string
         */
        private $mimeType;
        /**
         * Unique name
         * @var string
         */
        private $uniqueName;

        /**
         * Create a new PHPExcel_Worksheet_MemoryDrawing
         */
        public function __construct() {
            // Initialise values
            $this->imageResource     = null;
            $this->renderingFunction = self::RENDERING_DEFAULT;
            $this->mimeType          = self::MIMETYPE_DEFAULT;
            $this->uniqueName        = md5(rand(0, 9999) . time() . rand(0, 9999));
            // Initialize parent
            parent::__construct();
        }

        /**
         * Get image resource
         * @return resource
         */
        public function getImageResource() {
            return $this->imageResource;
        }

        /**
         * Set image resource
         * @param    $value resource
         * @return PHPExcel_Worksheet_MemoryDrawing
         */
        public function setImageResource($value = null) {
            $this->imageResource = $value;
            if (!is_null($this->imageResource)) {
                // Get width/height
                $this->width  = imagesx($this->imageResource);
                $this->height = imagesy($this->imageResource);
            }
            return $this;
        }

        /**
         * Get rendering function
         * @return string
         */
        public function getRenderingFunction() {
            return $this->renderingFunction;
        }

        /**
         * Set rendering function
         * @param string $value
         * @return PHPExcel_Worksheet_MemoryDrawing
         */
        public function setRenderingFunction($value = PHPExcel_Worksheet_MemoryDrawing::RENDERING_DEFAULT) {
            $this->renderingFunction = $value;
            return $this;
        }

        /**
         * Get indexed filename (using image index)
         * @return string
         */
        public function getIndexedFilename() {
            $extension = strtolower($this->getMimeType());
            $extension = explode('/', $extension);
            $extension = $extension[1];
            return $this->uniqueName . $this->getImageIndex() . '.' . $extension;
        }

        /**
         * Get mime type
         * @return string
         */
        public function getMimeType() {
            return $this->mimeType;
        }

        /**
         * Set mime type
         * @param string $value
         * @return PHPExcel_Worksheet_MemoryDrawing
         */
        public function setMimeType($value = PHPExcel_Worksheet_MemoryDrawing::MIMETYPE_DEFAULT) {
            $this->mimeType = $value;
            return $this;
        }

        /**
         * Get hash code
         * @return string    Hash code
         */
        public function getHashCode() {
            return md5($this->renderingFunction . $this->mimeType . $this->uniqueName . parent::getHashCode() . __CLASS__
            );
        }

        /**
         * Implement PHP __clone to create a deep clone, not just a shallow copy.
         */
        public function __clone() {
            $vars = get_object_vars($this);
            foreach ($vars as $key => $value) {
                if (is_object($value)) {
                    $this->$key = clone $value;
                } else {
                    $this->$key = $value;
                }
            }
        }
    }
